Oort cloud

== English == === Etymology === A cloud-like structure, named after Dutch astronomer Jan Oort, who proposed it. === Proper noun === the Oort cloud Alternative letter-case form of Oort Cloud (“the Solar System's Oort cloud”). === Noun === Oort cloud (plural Oort clouds) (astronomy) A roughly spherical region of space composed of comet-like bodies and other minor planets and asteroids that orbit distantly in a planetary system. ==== Hyponyms ==== Oort Cloud (“the Solar System's Oort cloud”) ==== Coordinate terms ==== Kuiper disc Kuiper belt asteroid belt